NEW NOAA REPORT – POSSIBLE 2100 SEA LEVEL RISE IN WORST WARMING SCENARIO RAISED FROM 6 TO 8 FEET

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23 january 2017

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One of the last Obama-era climate reports had a troubling update about the rising seas

By Chelsea Harvey, The Washington Post, January 23, 2017

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A 2012 NOAA report on global sea-level rise included four possible climate scenarios, each involving different degrees of ocean warming and glacier melting around the world: one scenario with high sea-level rise, one with low sea-level rise and two intermediate scenarios. The report suggested that the most extreme scenario could result in 6.6 feet of global mean sea-level rise by the year 2100. At a minimum, it suggested 0.7 feet of sea-level rise by that time.

The new report includes six possible climate scenarios, and it updates both the highest and lowest sea-level-rise estimates. It suggests that in the most extreme scenario, global mean sea levels could rise 8.2 feet by the year 2100. And in the lowest scenario, sea levels may rise by about one foot by the end of the century.

The authors decided on these updates by consulting a number of recent published studies on the subject. The increase in the upper extreme estimate from 6.6 feet to 8.2 feet was partly based on an improved understanding of the physical processes affecting the world’s major ice sheets, Sweet noted. [William Sweet is referred to earlier in the article as "a NOAA oceanographer and one of the report’s authors".]

He pointed to several recent studies modeling the response of the Antarctic ice sheet to climate change.....

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